Gunpla for sale

If you have 50,000 yen lying around on your living room floor that you keep tripping over then you may be interested in buying this completed MG Strike Freedom from Yahoo Auction (click the link on the top of that page to see the auction).
I've seen some really nice completed Gunpla at shows for reasonable prices but I just feel wrong buying a Gunpla that somebody else made. For me, a Gunpla should be enjoyed by building it - not buying it (especially when it costs 500 USD!)
Anybody else feel the same?