I don't know. Seems like if you have the funds to buy a new kit to get a part you messed up more power to you.
As for kits as investment. Seems like those Wingnut kits are a good place to start. Some of the releases have sold out and their prices have begun going up on secondhand market. It will be funny when they rerelease them and guys are complaining about buying them on ebay at 300% markup.