These are the cheapest Nvidia GeForce RTX graphics cards you can buy
https://www.theverge.com/2018/10/18/17990764/nvidia-geforce-rtx-graphics-cards-2070-2080-ti-price-cheap
Nvidia’s expensive GeForce RTX graphics cards are now available, and several manufacturers have released their own takes on the RTX 2070, 2080, and 2080 Ti. And an increasing number of them are more affordable than Nvidia’s own Founders Edition reference cards.
In most cases, you’re looking at up to $100 off, which makes the RTX 2070 cheaper than the last-generation Nvidia GeForce GTX 1080 Ti. Currently, the savings vary depending on the card you’re after. The RTX 2080 and RTX 2080 Ti have yet to see much of a discount, though that’s likely to change as more manufacturers bring cards to market and demand dampens a bit.