Review of Cheap Ebay GPS Speedometer

I have kept my eyes open and picked up several Garmin GPS off egag, C/L, and the local thrift stores. I have one I paid 5 bucks for and had to spent another buck on a cord, and another I spent 10, and one I bought for 15. Most expensive came off CL for I think 40 but it was like new These are all similar to the "Nuvi" series. Only disadvantage is they have to "warm up." LOL