The managed payments system is what the hold up is. It is a great
concept but terrible execution. It is better with PayPal which offers
immediate access to your money which is somewhat essential when
purchasing more inventory also now I have to come ...
Not exactly sure as to what items you are selling but something like
OfferUp might be better for you in some cases. Just be sure to use the
in app purchase tools to ensure payment security and discounted rates on
shipping.