Here we have a complete amb 20 timing system as used for my old rc club.
I bought this about 18 months ago, used it for a year and then moved house. I have reconditioned some of the transponders and all work well apart from yellow 6, green 3,4 and 9 these need new batteries fitting. There is a guy on eBay offering this but to be honest you can buy suitable batteries from maplin and do it yourself.
Looking for £600 for the whole kit. I will not split the system up for parts, it's all or nothing.
You get the transponder tester and the case as well.
Thanks
Ben