Whizzer (don't actually regret selling, it, I just regret not waiting a couple of years for it to go up 5x in value!)
PH Phoenix MK1B
TX200SR (replaced about a year ago)
Park (wasn't that accurate, should have rebareled it)
Sirocco GP
Career carbine (recently replaced)
Superstar carbine .177 (should have just taken out the gasram and reverted to spring / short stroked it a little)
Mostly I sold stuff I wasn't using, so no big deal really. It's only the unnusual stuff that's tricky, as it's not easily replaced.
The varied collection has grown a little too large, and I'm moving house soon, so a little more thinning may be required.
Always looking for any cheap, interesting, knackered "project" guns. Thanks, JB.