Aww its the character I failed at finding a house for!
Does he sell strictly comic books or merchandise and such as well? Ginny would probably come in the shop to buy stuff for Teddy regardless, but she would probably be more inclined to make trips for posters and things too - she's going to get a project of making a playroom for Teddy and James (cause two month olds need playrooms, obviously) soon.
Either way, I think she'd like him and be fascinated about the computer.