4 Sprockets for sale, 44 tooth

I can't use 44 tooth sprockets at my 6800 foot altitude in Colorado and have 4 sprockets for sale. Priced at 12 shipped to your location.

I also have a 50 tooth sprocket for sale and that is priced at 25.00 shipped. If you wish to trade, I will glady trade 1 for 1 for 48 tooth sprockets. 48 tooth sprockets seem to be the best compromise between uphill torque and level speed in my area. Thanks!