The Crimson Binome
Hero
Within the intended context, without regard for the availability of the outside market, these magic boots are always better than no magic boots.Which while fine on paper is unenforceable in practice. Even within the party are characters not allowed to sell or trade items between themselves?
You could say that it's a fragile premise, and I wouldn't argue the point. If you do introduce an economy of magical items, though, then guaranteeing that all items remain valued would require significant effort on your part. Even in 3E and 4E, which went out of their way to try and make interesting items useful, they still largely fell by the wayside since they were competing for your money against items which did give you +stats.