If you're just looking for a cheap nylon reel, go Gosen OGSM or Forten Sweet.
Go to TW's string reel finder and sort them all by price. You'll see the cheapest ones there. But, you get what you pay for. Cheap nylon strings are just that - cheap and nylon. You aren't going to get whiz-bang performance out of them, but you will certainly be able to string a lot of racquets for very little money.