I picked my Isco II up for about £800 (sterling) so it was about 1/4 the cost of my (then) projector. They rarely come up over here in the UK and the only other one I've seen for sale went for about £1,000 if that's any guide. I'll consider not using the Isco when I eventually get a 4K projector and just zoom/shrink instead, but it depends on what it looks like since I'm in a very long throw set up which is optimal for a lens user.
"Don't believe everything you read on the internet". William Shakespeare 1615