There is no denying MP1 was a superior toy at the time it came out and I'd be amazed if anyone into Transformers at the time did not buy it. Thing is when MP10 came out most people didn't jump on board because they already had MP1/4 and I include myself in that number too as my interest in Transformers had waned at that point having skipped MP6-9.

But when the Hasbro one came to Toy's R Us on a sale at the time I couldn't pass it up for $112.50 and after playing around with him ever since I've come to like him much better then MP1. Looking back knowing what I know now I probably would be happy to pay more then that for MP10. I wonder if both toys came out at the same time which would people buy? But if I never bought the Hasbro MP10 I probably would never have got back into Transformers, well maybe just Soundwave but I wouldn't have bought the cars at all. The new scale was what is really enticing me now and was why I paid an inflated price for Sideswipe because I had the Hasbro Prime that and I didn't think he'd be re-issued.

I mean obviously new fans would buy MP10 now as he's the only one you can buy now new. I think if they both came out back then and both sold at the same price I probably would have bought MP10. As for the MP's I bought they were...

Hasbro 20th Anniversary Optimus Prime (Retail some local store)
MP2 Ultra Magnus (Retail Target)
MP3 Greenscream (Online somewhere forget where)
MP4 Optimus (Online somewhere forget where)
MP5 Megatron (1 from Ebay and 1 from BBTS plugged)

Hasbro MP10 Optimus Prime ($112.50 TRU)
MP11 Starscream ($229.98 Ebay)
MP12 Lambor ($184.45 Ebay Didn't think he'd get re issued at the time)
MP13 Soundwave ($189.99 BBTS)
MP15 Ravage & Rumble ($72.85 BBTS bought 1 for a friend for slightly cheaper shipping)
MP16 Buzzsaw & Frenzy ($86.83 BBTS)
MP17 Prowl ($90 RK)
MP18 Bluestreak ($84.32 RK went with cheaper shipping)

All prices above include shipping if applicable, I do not know how much they cost without shipping as at the time when I started logging all my expenses in excel I included shipping on the entry since that is the total I paid for the toy.

I skipped Red Alert because I missed the boat when they came out initially and I didn't want to pay inflated price for Red Alert especially since he's a pretty minor S2 char.