Megger Newlec what are they worth ??

[Optic]

Hi, my mate has a couple of testers for sale but could you give us some idea what they are worth, i've tested them against my megger 1553 and they are coming up with the same results,

Newlec NL175 Rcd tester,

Megger lt5 Digital Loop tester

and a Megger BM205 insulation tester

All in good condition with leads,

thanks,