How good is your decryption skills?

[Radio_Shack]

What does this say. I give you a hint. The key is 4 letters and is well known here.

506550461544533534545461529540530544461539540545461544538530537537439439

There is no space between the 6 and 1. terb is putting that in there.

 

[my2cents]

ymmv

 

[Radio_Shack]

ymmv

The key to decrypt the phrase is 4 letters and it is not ymmv. Once you figure out the 4 letter key you still need to decrypt the phrase that the numbers represent.