In Denmark one can get a nice pair for between £1200 (1300€) and £1800 (2000€). There are not that many for sale here either though. 

/Dennis 

I have one of the last runs Beolab 9 2015. Fantastic.

Far as I know there is no real revisions with them apart from later models available in different coloured fabric fronts. They're completely analogue so there's not much to go wrong other than abuse.

I've never seen a pair under €2250 here in Belgium and I've been keeping my eyes open for over a year now :-(.

Decided to go for a 2011 pair from first owner, price €2500. Will probably take delivery somewhere next week. I'm excited!

https://www.marktplaats.nl/l/audio-tv-en-foto/#q:beolab+9

Actually, that is where I got them from. Was regularly checking all secondhand sites of the neighboring countries as well..

Congrats on your purchase. 2000-2250 euro seems to be the lower price bracket for used Beolab 9 in Belgium.

I always use HifiShark.com to monitor prices. Here you can narrow in on current and historical listing prices for pretty much everything from everywhere. I believe Imay see your set here as well.