-
Yeah they are popular. Not sure why to be honest, I would have thought that 10-speed TT parts and bar-end shifters are both fairly niche uses... The TT guys I'd expect to be on 11-speed by now
Edit: and yeah, eBay is where I had most luck. The auction ones tend to go for a bit more as there's more chance for people to notice them, your best bet is to find a cheap set with Buy It Now.
Double edit: this looks like a reasonable deal actually. Keep what you need and sell the rest on, pretty sure that stuff is worth a bit more than £100 separately.
If you go on eBay, set up an alert for "SRAM TT" and check the email every day. I bought a pair that were £30 buy it now. Also join some Facebook groups for selling bike parts (if you're in the UK there's one called "UK bike parts for sale or free"). If you look at the sold listings on eBay £25-£30 seems to be the best price you're going to get.
Also you could have a look at the classifieds on here, better chance of someone doing you a deal.