Paying over retail is a waste of money for any
toy IMO. If a toy proves ridiculously hard to find then I might consider paying above RRP, but not by a whole lot. Even then, I'm not gonna be happy about it (at best I'd be quite satisfied, but not elated).
e.g. United Frumble. That set was freaking hard to find for me. Often I'd see it pop up at prices I wasn't willing to pay, like $100 or more (for two regular retail store release Scouts? Erm... no thanks). I finally found them for 4200JPY ($53), $23 above RRP. Still wasn't happy. So I haggled and bargained it down to 3486JPY ($44 - more like $40 as the AUD was stronger then) - so $10 above RRP. Not delighted, but acceptable - so I accepted it. My worst case of allowing myself to be ripped off was United Wheeljack... prior to finding it I'd be searching for Generations Wheeljack for months
with no success. Then I found a United Wheeljack for $38, so $8 above RRP. I caved and bought it. Then about a few weeks later I find Generations Wheeljack at my local Kmart for $25!
Yes, United Wheeljack is nice, but not worth paying $8 above RRP nice IMO. I would have gladly picked up Generations Wheeljack for $13 less!! <sigh> But again, it was because I'd already been looking for ages and ages without finding it. But in hindsight I wish I'd waited a bit longer to get Generations Wheeljack.