Some considerations regarding the Horseshoe Gardenas;
The reality is that this is not a useful set by itself, neither for cash games nor tournament play.
It is somewhat odd that the set has no $1 chips, which greatly limits the usefulness of the set for cash play -- perhaps there's another horde hidden somewhere in your family?
Perhaps it was being built for $2/5 play, but there are very few $20 or $25 chips. OTOH, there is an unusually large number of $100s.
At the same time, there are none of the larger $500 and $1000 denominations which (along with more $25s) would be needed for tournament play.
The $5s, $20s, $25s, and $100s will be popular; the $2s, $10s, and $50s will probably have a very limited market appeal.
Thus you will have to offer them as either a very expensive but unwieldy non-functional "set", which might be a tough proposition in the mid-four-figure range, or sell them by the rack.
(FWIW, as bonafides, I have more than twice this number of these chips, and am probably not a competitor for these chips. GL whatever you decide to do with them!)...)