This year OnePlus will go for a multi-tier strategy and will launch the OnePlus 7 and 7 Pro. The Pro model will offer numerous upgrades over the vanilla model and it will be pricey (by OnePlus standards). Rumor has it that the OnePlus 7 Pro with 8GB of RAM and 256GB storage will cost 750 while the top-specced 12/256GB model will be 820. The price for the base 6/128GB memory option is unknown, but should be around 700. Note that there might be small differences between EU countries. For US pricing, there's a very good chance that you just swap the sign for a $, meaning...
Source: https://www.gsmarena.com/oneplus_7_pro_prices_will_start_at_around_700-news-36733.php