Yes, should be easy. Would it work if it used the region's ebay marketplace to get results? The following could be added:

  EBAY_AT - Austria (ebay.at)
  EBAY_AU - Australia (ebay.com.au)
  EBAY_BE - Belgium (ebay.com.be)
  EBAY_CA - Canada (ebay.ca)
  EBAY_CH - Switzerland (ebay.ch)
  EBAY_DE - Germany (ebay.de)
  EBAY_ES - Spain (ebay.es)
  EBAY_FR - France (ebay.fr)
  EBAY_GB - Great Britain (ebay.co.uk)
  EBAY_HK - Hong Kong (ebay.com.hk)
  EBAY_IE - Ireland (ebay.ie)
  EBAY_IT - Italy (ebay.it)
  EBAY_NL - Netherlands (ebay.nl)
  EBAY_PL - Poland (ebay.pl)
  EBAY_SG - Singapore (ebay.sg)

As others have said, a filter on item location would be ideal, but the region might also work. Specifically UK/GB for my use case :)

Thanks for putting the site together!

Thanks! Here's the UK version: https://lowcostminipcs.com/uk/

Amazing, thanks, and thanks for responding to this comment, much appreciated :)

region can help but Item Location is the important one

Would be great to have a GB/UK version.

UK version: https://lowcostminipcs.com/uk/

yes that'd be great!

and if the price could somehow include the shipping rate to the country, that'd be awesome

ebay isn't widely used in the EU. Sure the sites exist, but they're just filled with ads, not by listings put up by consumers.

You'd need to support national alternatives, like marktplaats for NL

It is still widely used in Germany.

ideally you would add regional popular second hand websites too.

I don't know about the USA but in most europe countries ebay is less and less the default place to look for second hand items.

What are some alternative EU sites?

I don't think there's an EU-wide site for used items unfortunately. Each country has a couple of local sites.

leboncoin.fr in France, subito.it I believe in Italy, in Spain Wallapop.es although wallapop also exist in some of those euro countries, anibis.ch in Switzerland, I am not sure about the rest and I guess they don't have a public api so you would probably have to rely on web scrapping.

+1 for Wallapop in Spain. There's also MilAnuncios, but Wallapop is what people say when they say they want to sell second-hand stuff

blocket.se, tori.fi, huuto.net or huutokauppa.fi. I think.

marktplaats.nl is the big "eBay-like" for the Netherlands.

kleinanzeigen.de for Germany

Yes please, this would be very helpful (I’m in Australia).

Perfect, please do add these!

Yeah that works too :)

Another approach for this if you're in europe (I do not know the market elsewhere) are the quality refurbished resellers (they buy bulk from companies upgrading, refurbish, sell with warranty).

Eg in France https://www.afbshop.fr/PC-Bureau or https://www.tradediscount.com/ordinateur-bureau/unite-centra...

Price might be a bit higher, but eg right now for sub 200 you can get a mini pc with ryzen 2400G and 16GB of RAM, with warranty. That's a great proxmox machine for jellyfin & co.

seconded, i've been looking for exactly this kind of machine in EU and this would be ideal.

which eBay marketplace do you use?

Spain.