finding property values in random areas across the US

i have rough idea of the prices of homes i’m looking for, adn i want to begin looking at what areas of the country may be best for me.

if i wanted to find an area with 100K median home prices, how would i even begin to find that? i mean there’s areas i have in mind, but i don’t even know how to figure something like that out.

is there maybe some MLS site that will allow me to just see what’s on the market, or do i have to register? maybe some kind of gov directory listing median home prices by town or county?

thanks for any ideas