I think this would be a great add on. Here's why.
1. If someone is selling items in CS you could just search their name and you could see what they are selling.
2. I know that there are plenty of merches that have tons of great stuff in Cs. For ex. Hardfeather, I'm always finding his stuff. It would help if we could search their names to see what they are selling.
3. If you want to surprise a friend and buy there stuff from Cs. I try to do this when I see they are selling. It's a nice surprise.