I have over 1,600 golf balls mostly for practicing. Some (maybe as many as 500ish) are definitely playable for beginners or high handicappers (or even descent players) but the majority are definitely just for practice. If you just used the playable balls, that'd be only 30 cents each and then you'd have over 1000 practice balls for free!
If you hit them on a range you'd be saving a lot of money. Range balls these days go for almost 25 cents a ball (small bucket) to about 18 cents each for large bucket. These are less than 10 cents a piece. And much better than range balls. plus you can reuse them!
If you don't want them all, let me know and we'll work something out.