u2 singles

i know someone selling old u2 7" vinyle singles from the early days. they
come as two sets, 4 records per set and are labeled "u2 4-play" (available in
ireland only).
The singles include such songs as: u2 three, fire, a celebration, 11 o'clock
tick tock, i will follow, touch and a few others. they come in a plastic
display that you could hang on a wall. if anyone would know any info. or
value of these or could direct me to someone who could help me, it would be
greatly appreciated.

thank you very much,

SP