I don't know how many of those films you have... but if you buy a really cheap video recording device, the result will look okay, not more. If you spend more money but are only digitalizing 30 minutes of film, you will probably be better off just sending the footage in.
There are tons of service providers on the web that will receive your material and send you back a DVD or similar with said footage. And while they are pretty expensive for huge amounts, they usually deliver great quality (since every single image is scanned properly and they are not played back with weird frame rates and stuff...)
So, you might look some service up that just does it for you. I only know one in Germany, so I can't really give any good recommendations.