I think it's fair to say the following:
1: Buying a "parts" solo for parts from Ebay is a great deal.
2: Buying a "parts" solo with the intention of making it a full time flyer is a good deal, but only if you have most of the parts you need lying around (spare batteries, props, etc).
3: Buying a "parts" solo from Ebay with the intention of repairing it making it your primary flyer when you have no spare parts lying around is not a good deal at all. Even if you come in under the price of a new solo (and I doubt you can), you're not going to have a warranty to back that purchase up plus there are still some great "bundles" out there to purchase. I'm not just talking a 3DR warranty (not sure how good they are), but don't forget protection from the place you buy it from, not to mention protection offered on your credit card for all purchases (depending on what card and terms you have of course).
If anyone has other thoughts re: the above please post them, would love to know what your conclusions are from your experiences.