I don't see a lot of aftermarket sales in .eu.
This one could be nice if developed, but you have to consider that the pool of possible end users (buyers) is limited... it's a bit like weather sites, there isn't room for hundreds of those.
The .eu sTLD (supernational TLD) is not really popular, and was killed at birth by speculation and gaming of the TM system. Many .eu are defensive registrations, or redirects. On the other hand, .eu makes sense in this context (pan-European travel).
Sorry, but I think you will struggle to sell the domain as-is, undeveloped. It's always good to have a plan. I assume that anything I buy is not going to sell, which is the most likely outcome. So the question is, could you be your own end user ?