I used the Easy Jig 3, the entire setup was ~$300, with a bit set thrown in. It's not about cost, ready to go lowers have always been cheaper (especially if you bought blemished ones). For me, it's now knowing my AR better than I know my wife. If something breaks, it's not a mystery. It's a couple of pins, replace it, and get back to shooting.and it costs $600, probably more now. I'm sure 80% have gone up in price too.
I mean, if you were able to organize a group buy where the cost for the jig and tools is split up, it's worth it, but most people don't care to bother putting money down for something that isn't a guarantee.