Is this setup worth $300 ($600)

I currently have a Fuji XT-20 along with a few XF lens. I have a few spare cash with me and I'm keen to try out some old DSLRs and I came across a listing on FB marketplace with below listed items included for $300 USD. I have sent an offer for $150 USD. Is this setup worth for the price? I am not concerned about the low megapixel count or the poor ISO performance. I end up adding grain during post-processing and reduce the clarity anyways.

Nikon D90 Nikon D70s Nikkor AF-S 18-105mm F3.5-5.6 G Nikkor AF-S 18-70mm F3.5-4.5 G Nikkor 70-300mm F4-5.6 G Nikon SB-800