SFF, SA120 is fantastic but finding one in Europe seems tough. I wish they were around here as affordable and plentiful as in the US. I found a seller in eBay for a new unit, but there might be significant customs duties, and they can't do anything about it because of the Global Shipping program (they handle everything, like a forwarding service)How many drives, LFF or SFF? I've got a Supermicro SC825 I'm putting up for sale in the next week or so but it'll be too deep for you. Lenovo SA120 might fit the bill if you can find a suitably-priced one. What do you call cheap?
I haven't found any retailers for them in Europe yet, ugh.Have a look at these,
There are also 3U versions available. The ones that have "External" in the name are going to be shorter depth. For example DS-12H I believe is 18 inches.
You will have to check your European vendors/retailers for these part numbers to see who has what and at what price, but I think that Norco is generally available worldwide?
Also, be sure to check ebay.