WOW you aren't kidding. First gen Threadrippers are cheap now.
I've seen the 1950X as low as $450 at Microcenter. TR4 motherboards are quite expensive, but right now the Taichi is around $260 after rebate at Newegg. Note that not all of the motherboards are designed to handle the higher-TDP 2970WX/2990WX, if you think that's an upgrade you'd make then look for one with a beefier VRM. Also, the cheaper ones lack 10 GbE or some other higher-end features.
You can also find the 1700 as low as $130 if you watch around. Needless to say, if you have any batch-processing type tasks that don't need AVX2, that's a hell of a deal too.
(also, to be blunt, AMD processors undergo such extreme depreciation that they're practically disposable. After two years, AMD's flagship 1800X processor has lost 2/3 of its value, a nice high-end mobo like a C6H is literally more valuable than the flagship processor you had put on it. So it makes sense to have the processor be the one with the easy-to-damage sacrificial part on it. Intel it's the other way around, the processors are expensive and your mobo is probably the cheaper part to replace if needed.)