We bought an atomic force microscope at a government auction
A Park Systems XE7 AFM came up on GovDeals listed as generic lab equipment. Here is why we bid on an instrument that cost more new than most cars.
A Park Systems XE7 atomic force microscope came up on GovDeals. It was listed the way these things usually are, which is to say badly: a category of “Laboratory Equipment,” a couple of photographs taken from too far away, and no meaningful description of what the instrument was or whether it worked.
It is a research instrument that cost somewhere in the range of seventy thousand dollars new. We won it.
Why nobody else did
This is the part people find hard to believe, so it is worth explaining.
Almost nobody bidding on government surplus knows what an atomic force microscope is. The people who do know are research labs, and research labs do not shop GovDeals. They buy from Park, or from a used-instrument dealer, and they expect the instrument to arrive calibrated with a support contract attached.
So the bidder pool for a listing like this is: scrappers who value it by the pound, generalist flippers who see an unfamiliar acronym and move on, and us.
There is also a real reason for the caution, and I do not want to pretend otherwise. An untested six figure instrument is a genuinely risky thing to buy. If the controller is dead, or a critical head is missing, or the software cannot be obtained, you have bought a very heavy sculpture. That risk is why the price is what it is.
The question is never “is this risky.” It is “is this risky enough to justify this discount.” Those are extremely different questions and most bidders only ask the first.
What we knew before bidding
We could establish, from the photographs and the listing alone:
| Signal | What we could tell |
|---|---|
| Model | Park Systems XE7, a research grade AFM |
| Completeness | All major components appeared present in frame |
| Vibration isolation | The isolation platform was included, and looked intact |
| Enclosure | Acoustic and vibration enclosure present |
| Electronics | Unknown. No way to tell from a photo |
| Software | Unknown at bid time, and the biggest single risk |
The vibration isolation mattering as much as it did surprises people. An AFM measures surface features at the nanometer scale. It is, functionally, a machine for detecting extremely small vibrations, which means it cannot tell the difference between the sample and a truck going past outside. The isolation system is not an accessory. Without it you do not have an instrument, and sourcing one separately is expensive.
Seeing the isolation platform in the photo, intact, moved this from a gamble to a calculated buy.
The condition, hands on
I went and collected it. What I found:
- The anti-vibration isolation platform is in good condition.
- The unit appears complete. All major components present.
- Cosmetic wear and scuffs on the cabinet, which is normal for a lab instrument that has lived a life.
- Electronically untested. It has not been powered up.
That last line is the honest one and I want to be clear about it, because the difference between “complete” and “working” on an instrument like this is the difference between a strong asset and an expensive lesson. We do not know yet. The power on test is the next gate, and it is worth a great deal of money in either direction.
Why this instrument and not another
We did not buy this because it was cheap. Cheap things are everywhere. We bought it because of a specific, unglamorous detail about how Park licenses its software, which turns out to be the single largest source of discount in the entire used AFM market.
That detail is worth its own post, and it is the next one.