I hope I didn't already post this. I couldn't find it so I don't think I did.
This ATG from the Tape Depot is great! It's inexpensive and you can also get it with a starter kit of 6 rolls of tape. It holds different widths of tape which is really nice. Some ATGs only hold one size like 1/4"
Here is the link:
ATG 50 TAPE DISPENSER - SCRAPBOOKING ATG TAPE GUN | eBay
You may have to copy and post the link in your browser window. The ATG is a great gun without the name brand.
Just thought I'd share.