Recently bought a Garmin eTrex Summit second hand from eBay, it's in full working order and a joy to use. It is supplied with the RS232 9-pin connection cable, and, as my laptop doesn't have this socket, I bought a RS232 - USB adaptor. The hardware for the adaptor has been accepted by my laptop, but I'm unable to sync the GPS with my software (I have OziExplore, Base Camp and Easy GPS).
Anyone had the same issues??