Can I just buy any 19" Monitor?

I just bought an off-lease Dell P1110 21" (Flat Trinitron)
for $168 CAN ($135 U.S.). It came with a 7-day satisfaction guarantee + warranty. It appears to be in mint condition. There seems to be lots of them around, especially in small local computer shops. Since they're off-lease, try it in store and make sure you can return it after a short test if you don't like it. There are also 19"
versions around but I would stick with 21"-22" Trinitron tube monitors of various brands (Dell, Sony, Mitzu., Compaq, etc) ...they're not very expensive, especially considering that some were over $1000 new.