If your lucky you may find an older mechanical keyboard at a thrift store for less than a 5th of what it should cost, I use an old Tandy PS/2 keyboard on my main system and I personally like having the harder key press involved. when I looked online for the keyboard out of curiosity I found that it can supposedly go for over 100$ but if I recall correctly I paid under 20 dollars and the unit works great.
though do bear in mind that if you have a newer version of windows, even if you have PS/2 ports, you'll need to go into the registry editor. though this is a minor draw back as there are tutorials on the issue if you check YouTube or do a simple google search