I bought a Craftsman rethread set and started using to it to clean up threads on a M37 that someone else took apart. After a while I stopped using it and started using standard taps and dies. They work better IMHO.
For 150-300 uses I'd go but a tap or two and a high quality handle, if you don't already have one.
If your going to buy taps and dies stick to stuff made in the USA. Greenfield Tap and Die or Cleveland Twist Drill are good choices.
If you eventually want a whole set frequent swap meets you can find some pretty amazing stuff at a great price.
I scrounged swap meets and flea markets for three years for taps. I have everything from #6 to 1 inch in both course and fine thread. Multiple taps in all sizes. A dozen or more in some of the more common sizes including taper, plug and bottom. Close to 300 taps in total. A few tap extensions. Everything is made by Greenfield Tap and Die, all tap handles are older high guality Starrett items. It would be very safe to say everything combined cost less then 500 dollars and it's been really, really useful.