Here are some hashrate after testing few of the GPU on NEW Ravencoin Kapow testnet which will switch to main net today 06.05
Gpu prices per hash are calculated from GPU prices from amazon. Of course this is not very accurate , as not everyone pays the same price for GPUs.
This is just to have an idea which GPU might be the best to use at these prices.
Here is the ling to excel spreadsheet numbers : https://docs.google.com/spreadsheets/d/1LRkuwtx2g7WkgelB64TC5MlzQlaACtLhCPZvpIHrRQI/edit#gid=0
One more link from RedPanda mining with more benchmark testing : https://docs.google.com/spreadsheets/d/1_d-BzXjpIUS8zUoQrxGQW90v-zCap7VKMfpZ4sQ2Gqg/edit#gid=0