A few years ago (like 8-12) I put together a few Harrah's cards (175 + am guessing).
Almost all cards are 2004 or older. (there may be a few exceptions, but not many)

There may be some duplicates but not many based on type/ location/ pre-fix... etc.

I also have 20 - 30 (also a guess) Harrah's room keys.

Am looking to either sell them - or trade for chips.
Are they worth more as a 'collection'?
Would it be smarter to cull out the goodies and give away the rest?
I really don't know what to do here because I collected slot cards only because I couldn't find any more cheap chips.

Right now, I am just looking for advice on these.
Suggestions or comments appreciated.