It's as legal (or as illegal) as the agreement with the service allows it to be. There are two things that sellers must disclose in Massachusetts: the existence of lead paint in the house and presence of a septic system.Learn how to register for BIR as a TikTok seller for tax compliance and legal requirements. The escrow period is the time between the signing of the real estate contract and the closing date, as specified in the purchase contract. A little side project of mine is E-Bay.