Just recently grabbed the following racquets for less than $6 each:
Wilson N-Code 95 Prostaff
Wilso Ultra FPK 95 tapered beam
Wilson Pro-staff 85 (Sampras and Edberg's racquet), Chicago Model
Prince Original Graphite, version 2 (one stripe, single grommets)
and lastly, two (2) Wilson K-factor (Del Potro's stick)
I am continuously surprised and amazed at the quality of racquets being donated.