Strange request, but I'd like to find any or all of NEO-5, NEO-6, NEO-7, or even earlier versions of u-blox GPS modules for a project I'm doing to compare performance of various generation GPS devices. I got a couple of NEO-6M modules on Amazon, but there's a good chance they're counterfeit. I have an NEO-7 coming from eBay, but I suspect it will be the same. So what I'm looking for are ones that have a reasonable probability of being real -- maybe acquired back in the day before the counterfeiters got to them. Happy to buy, borrow, or remove from your electronics waste bin. Complete receiver boards with UART, RS232, or USB output would be fine; so would bare modules in NEO or LEA form factor. Please contact me off-list to avoid diluting the SNR here. (The results of the project will be published.) Thanks! John