Not if you claim you originally bought it to sell after assembly...
Most states rarely pursue this stuff against Joe citizen, since it's basically a scam against businesses (that don't have a vote).
A lot of states also have tangible property taxes that are only imposed on businesses or the wealthy even though the law may state that everyone pay them. (they hit you on your house since it's the only thing of any real value most people have, they don't bother with 4yr old TV's and what-not).
This is why you see many businesses leasing everything.
Like every other person, just pay the sales tax at registration. You'll never hear from the state revenue people about it.