Hey I am wondering how you get these keys on such a good discount, and if you sell things like weapons for a cheaper value then they are worth, for example your keys are about 40% off the price, so could a 100$ item be worth 60$ in bitcoin?
Sometimes I get them from people who are liquidating massive inventories and items for keys. They would prefer to sell to me for a much lower rate in bulk because I can pay them in Bitcoin. They wouldn't mind selling the keys for the low rate because bitcoin is much safer than accepting PayPal for the keys. CS:GO case keys generally sell for around $1.7 - $1.85 USD when being sold over PayPal. But when it comes to Bitcoin, the price is usually around $1.6 to $1.7, that isn't bad when you consider no chargebacks and a lot less fees compared to PayPal
So yes, a $100 item on the Steam Market can be as cheap as $60 if paying in Bitcoin. It all depends on the seller really. I have had people sell me keys and items for as low as 45% market value.
Right now however, most of the keys are from my own inventory liquidation. I'm currently in the process of selling some big items that I've owned for a while. I rather hold Bitcoin than Keys and will just buy some of the newer knife skins when they get cheaper a few months down the road