In your situation, where this is going to be your first bit of major test kit, you go for the very best that you can ''Afford'' Your test kit is going to be your bread and butter, you (and any electrician) will not be able to function in this industry without decent and reliable test equipment. So if needs must, go a little over what you planned to pay, but NOT to the point where it's going to cause a problem for you.
As been stated there are bargains to be had on eBay, but there are also duffers. So if you decide to go that route, ask as many questions of the seller as you need. Any reluctance to answer should be seen as a red flag. Maybe PM some of the buyers of eBay stuff here and see how they go about things when purchasing from such sites!!