Theo would have protested but Remus seemed sincere and Theo supposed if he could make a purchase here it would be helpful to the ex-Professor's income. He had others to shop for as well and, thinking of it, Rabastan might appreciate something he could get outside to play with when Theo wasn't around, even if it was just a simple bat and ball excercise.
"Thank you Sir." he was sure to say before he entered, wary of leaving Remus behind him and hyperaware of the other's position, in case this was a trap and yes, he was that paranoid.