How much does a Supreme BOT cost?
Moreover, are Supreme bots illegal?
Bots aren't illegal, but they do go against a lot of sites' terms and conditions. Most sites actively make changes to try and combat sneaker bots. Supreme, Shopify, Nike, and adidas are very aware of bots, and regularly update their online protection against them.
Also question is, is Supreme BOT good?
Unarguably the most successful and hyped supreme bot on the market (with some users being able to buy 10+ CDG box logos) currently reselling for a hefty 1k. These bots are insanely good as they also run on Shopify so you can buy hyped sneakers as well.
Generally, it's not illegal to resell an item that you have legitimately purchased. Once you have purchased something at retail it is yours to do with as you choose. Manufacturers tend to have little or no control over a product past the first customer they sell to.