I have two listed, one is a fairly common TCS-300 stereo recorder (Sony)... the battery is dead, so I am listing it as non-working... it is at:

http://cgi.ebay.com/ws/eBayISA...IT&item=110409078221

and the other is a weird one, an Aiwa TPX-900... which can scramble a tape so it can only be listened to on a TPX-900 with the proper code keyed in... only saw one of these, so it may not be too common... it is at:

http://cgi.ebay.com/ws/eBayISA...IT&item=110407293042