IMO I'd pass for the reasons previously stated. I'll add that a new Brooks saddle can be had fairly cheap when you hit a sale. I bought a new Brooks pro for around $60 bucks back in May. They were 25% off and they were running an additional 25% web sale at the time. Yep, timing is everything. I hit the site out of dumb luck.
I've got about 700 miles on that saddle now and it's getting just about there. I had a Brooks for the better part of 20 years and it got lost in a move. I used to really miss that saddle as it was part of me but now that my new Brooks is almost 100% broken in I'm golden.
Take the time and break in a new one. If you don't lose it you'll get years out of it. That saddle also looks like its better days may be behind it but without handling it I can't tell for sure.
Saddles are a very personal thing, especially all leather saddles like Ideale and Brooks. Would be cool for a commuter or MTN bike though if it is truly cheap...as in around $20 bucks or less.
As a side note, some guys in France are coming out with a new Ideale saddle this Fall. Here's the link:
http://www.victoire-cycles.com/en/ne...e-saddles.html