How does something "look rubber dome", is there a way to tell from the pic ??, also its not that price the guy said $20, would I just be able to get him to pull a key off?, can you just pry them off , of do you have to open the thing or use a special tool.
You can tell if something looks like a rubberdome with some experience, it's just how the keyboard is made, what the keycap sizes are (in this case not very usual), etc.
You can ususally just pull a keycap off with the help of for example a screwdriver. However this keyboard also has a Model number that is not listed as mechanical in the Deskthority Wiki. Chicony keyboards with a model number starting with 51 are usually more interesting.
I figured that this is a Chicony rebrand because I recognized its look and I also looked up the the first three letters of the FCC ID which leads to Chicony as well.