Equipment
Videos, audio books, slide projectors, filmstrip projectors, audio cassette players, CD/tape player with recording station, AV carts, scan converters (computer to TV...if compatible to your computer,) multimedia projector, vga distribution splitter, microphones (wireless handheld, lavelier, unidirectional dynamic, boundary), direct box, VCRs, DVD player, overhead projectors, microphone stands (tabletop and floor), video projector, large screen TV for presentations, opaque projector, easels, headphones, digital mini camcorder, tripods, IMac for video editing. 

Miscellaneous Supplies
Projector bulbs, batteries, transparencies, overhead projector pens, cables (VGA, XLR, RCA, coax, 1/4" phone, fire wire), connectors, adapters, transformers, extension cords, power strips, blank VHS cassettes, blank audio cassettes, bulletin board paper in variety of colors.

Catalogs
Numerous catalogs available to cover all off your A/V needs: 
Supplies
Equipment
Videos
Audio Books