When I called Whites to get to get info on the DFX that I recently bought, they were very helpful and told me that they service what they build all the way back to the 1960s. $200 for a repair/overhaul is very good. I read on one of the forums about a guy that bought an older Minelab Xterra 50 at a really good price. The display started dropping segments and finally got so bad that the owner called Minelab to get a rough estimate on the repair. If I remember correctly, he stated that Minelab told him it would be at least $350 + the shipping

. That really trumped the initial "good deal" on the purchase. Unless he really likes the Xterra 50, at that point, he could add a few $$$ and get a new 505.
So as you can see, only having $300 invested in a basically new DFX is an awesome deal. That machine is definitely worth quite a bit more than $300.