Genome editing and molecular tools

Buying guide

What settles a sequencer purchase before anything else is throughput matched to the question being asked. A platform built for whole-genome runs is wasteful on a targeted panel, and a benchtop system sized for amplicon work will not clear a population study in any reasonable time. Read the quoted output in gigabases per run and the read length together, because a high gigabase figure built from short reads answers a different question than fewer, longer reads that resolve structural variants and phasing. Match that to the chemistry the instrument is locked to, since the consumable kit, not the box, often decides what a run actually costs per sample.

On a used sequencer the verification is specific and worth doing in person. Ask for the cycle count and the run log, because the optics and the fluidics age with use, not with calendar time. Confirm the instrument control software version and whether it still receives the maker's updates, since an orphaned version can strand you on obsolete reagent lots. For any platform with a flow cell or a sipper, check that the fluidics have been flushed and parked rather than left loaded, and establish which reagents are still commercially supplied for that model. A diagnostics instrument carries the same questions plus its calibration state, so ask when it last ran a known control and what the result was.

The spread in this category is wide, and the band tells you why. Prices run from EUR 61 to EUR 107.611. The floor covers accessories, single modules and older bench units, while the ceiling reflects complete high-throughput sequencing systems with their imaging and fluidics intact. The average listing sits at EUR 9.037, which is where most working sequencers and mid-range diagnostics platforms land. The brands that occupy these bands are Illumina, Thermo Fisher Scientific, PacBio, Invitrogen, Roche, and the name on the box shapes what a unit costs, what a kit for it costs, and how cleanly one listing compares against another. A refurbished sequencer listed for sale is more affordable than the same model new, and whether that saving fits a budget depends as much on the ongoing consumable spend as on the purchase price. Warranty, where it matters to you, is arranged in consultation for the specific listing.

Types of Genome editing and molecular tools

Which sequencing and diagnostics types are listed?

Among the listings that specify a type, the catalogue divides into a few recognisable classes. NGS systems, the massively parallel sequencers, dominate: these run millions of reactions at once and are the workhorse of modern genomics, proteomics support work and population-scale studies. DNA sequencers in the narrower sense cover the older capillary and single-sample instruments still used for Sanger confirmation and short targeted reads, where a lab wants one clean sequence rather than a flood of them. Molecular diagnostics equipment forms the third group, built to run validated assays on patient or quality-control samples. Genomic analysis instruments round out the sample, covering the downstream platforms that quantify, size or prepare nucleic acids ahead of a run. A buyer reaches for a high-throughput sequencer when the question is "what is in this whole sample", and for a capillary DNA sequencer when it is "is this one sequence correct".

These instruments carry most of molecular biology on their backs. A sequencer is the core tool of genomics and the read-out step for gene editing, where it confirms that a CRISPR edit landed where it was meant to. The diagnostics platforms run molecular diagnostics assays, from infectious-disease panels to oncology profiling, and the same hardware supports immunoassay-adjacent nucleic acid tests. In a bioprocessing or biomanufacturing setting these tools verify cell-line identity and monitor genomic stability across a production campaign. Sample-preparation and library work feed every one of them, linking back to the electrophoresis and protein purification benches upstream. A used DNA sequencer for molecular diagnostics, a benchtop NGS system for targeted gene panels, a capillary sequencer for Sanger confirmation: each pairs a class of instrument with the field it serves, which is how these units earn their place in a cell culture, microbiology or synthetic biology lab.

The brands behind the sequencing listings

The names that recur here are Illumina, Thermo Fisher Scientific, PacBio, Invitrogen, Roche. Their presence shapes the buying decision in concrete ways. A platform from a widely deployed maker is easier to compare across listings, because many of the same model sit in the catalogue and the spec sheets line up. It also tends to have a living consumable supply, which matters more on a sequencer than on almost any other instrument, since the kit chemistry is what the box is built around. Where a brand is less common in the catalogue, expect fewer directly comparable units and a thinner secondary market for the matching reagents, both of which feed back into price and into how confidently a buyer can judge one listing against another.

What a used sequencer costs here

Every unit in this category is listed used: 100 percent of the listings are used. Prices run from EUR 61 to EUR 107.611, and that spread covers everything from single accessories at the floor to complete high-throughput sequencing systems at the ceiling. The average lands at EUR 9.037. Parts for these instruments can be sourced via Questpair, and documentation for a specific model can be requested from Questpair specialists, who respond within an hour.