Yet another link, this time a british one:
Dive Computers and Freediving Computers - Watersports Warehouse
Although they do not list the F.10, they offer some other computers for very attractive prices - for example the TUSA IQ-900 Ze for just £229. That's less than the F.10 costs in most stores, and the Zen does also scuba, and has much more features than for example D4 (more alarms, lap timers, countdown timer, freedive deco, user replaceable battery,...). That looks like a very good deal, and if I needed a new computer, seeing the price and features, I'd probably go for this one.
Please note that I do not know any of the vendors (except of the French one, which is a local store here in Lyon), so do not know their quality and reliability. Well, I have also second hand experience with the Italian store - two club colleagues bought the F.10 there, wihtout any problems, but the computers needs to be sent to AERIS for the battery fix anyway (that's problem at most F.10's, except if the vendor has already receiuved a very recent batch with the fix).
I am also not affiliated to any of the vendors, so there is no bias. On my website, I use some affiliated links to Amazon and LeisurePRO (who also have quite inexpensive offers), but I won't post themhere on DB.
I also have no personal experience with the TUSA Zen computer, and my comments are only based on the features I found in the documentation.