I wouldn't pay more than £2, the image looks like it's really tacky and I doubt there s a large market for MLP rugs.
If you could post a better image it would help.
I got $25 for one in the past. You'd be surprised.
I wanted to get as much money as possible, without going overboard.
"As much as possible" means there can be no "overboard." Aim high, and then lower the price later if necessary. You know you can get $25 for a rug, so I'd say that's the minimum you should charge to start with.