https://www.pokerchipforum.com/threads/as-5s-horseshoe-clev-sec-25-and-500-hard-rock-ac-1s.52112/
Horseshoe Clev $25 sec mint (not the one in your picture) $180/rack is the seller's price. Could try to negotiate if you're really interested.
As you're looking to build a 500 piece set, it is better if you save up some cash to purchase a full set if any comes on offer, or at least buy by the rack. Some sellers are extremely nice and would take a small loss to introduce new chippers to their first set of Paulsons, but most will want to sell the whole set together. Any idea what is your budget and breakdown of denominations so far?
If price is a constraint you could always consider using China Clays before making the jump to Paulsons. Find a chipper near you with some samples to check them out! They're decent quality chips as well for a much lower cost.
Cincys are cheaper (significant difference if you buy multiple racks and add up) and more easily available (you can get a complete set from Chip Exchange and choose your own breakdown), although you would have to clean and oil them yourself (time consuming).
If your games require fracs, suitable ones are harder to find, and definitely more pricey than the 1s and 5s. Also no fracs came from the casino itself; any fracs used to complete the set come from other casinos/card rooms (and overlabel/relabeled). If you do not require the $25 and up, you can consider buying the $25s and overlabel to change them into fracs using Gear non-laminated labels.
Hope this helps! I am a beginner as well and I have just gotten my first set of HS Cincys
