If you want a so-so quality one, you can get an EasyCap for about $20 (http://cgi.ebay.com/Video-TV-DVD-VHS-Audio-Capture-Adapter-USB-2-0-Easycap-/400141508188?pt=LH_DefaultDomain_0). A good quality one for $80 (Dazzle: http://www.bestbuy.com/site/Pinnacle+-+Dazzle+Video+Creator+Plus+HD+Video+Capture+Cable/9714371.p?id=1218156775760&skuId=9714371&st=capture%20card&cp=1&lp=2) and a High quality one for $200 (HD PVR: http://www.bestbuy.com/site/Hauppauge+-+HD+Personal+Video+Recorder/9317768.p?id=1218084034619&skuId=9317768&st=capture%20card&cp=1&lp=4)
I have a dazzle DVC 170 [Platnum] Which is the top of the line dazzle and can run you about 150$ (Amazon Platnum But I got mine for a steal about 120$, you can check the quality of capture card on my youtube [OPproductionzz]
This is the cap card I would suggest for you and once you decide on which capture card you want, and buy... I'll help you set it up.
P.S. I made a video tutorial for plugging in dazzles on my youtube.