[mothered]

I am not sure, but I read somewhere that Apple will blacklist your phone making it useless.

So maybe get it from a carrier and then get it unblacklisted via eBay third parties?

Generally speaking, the IMEI number Is placed In a pool of blacklisted numbers and upon trying to activate the phone with a given carrier, they will see It's blacklisted and decline activation.

In answer to your question, you can box the company. The phone Is extremely light (around 180 grams), so extra packaging will make up the difference In weight on consignment.