$500 for used set, $30-$35 per round are still a lot of money. Typical folks in their 20s, 30s can't shell out that kind of money when they are trying to make a living and raise family. Nor can they spend 1/2 a day to play golf so often. This effectively makes golf a hobby for a limited crowd (aging/retired folks with some money to spare). I am generalizing of course but you get the point.
The last economy boom (housing bubble) & Tiger Wood phenomena created a lot of excess in the golf industry. I see continuing consolidation (closing golf courses, smaller companies being acquired, ...). Dicks is a part of that besides their inept golf business model (people's buying habit these days do not support their pricing strategy).
$500 for a used set where are you buying your clubs at? I have a used set of clubs I'll sell you. My first set cost me $180 that's putter, bag, driver, irons brand new 3 years ago, I could still be playing with those clubs too, they were fine, I just got the itch and wanted new clubs. It cost me $8 to play at my muni courses because I walk, and have a discount book that gives me twilight rates during the week, if I don't use it, and I walk it's still only $15 still $30 with a cart.
The problem with golf today is simple, it is the market correcting itself, its economics 101. Golf companies are saturating the market with new clubs every 6 months, most people by clubs every couple years except for club ho's. That creates low demand and high supply, which means what? Price should go down, heck a few months ago you could by a brand new bio-cell driver was $300-$400 for under $200. While at companies like Dicks the prices really haven't dropped if at all, so what are most people doing? Buying from the less expensive options, ebay, amazon, online retailers, etc... so that is putting companies like Dicks out of business. Same reason GM failed a few years back, they refused to changed lets keep pumping out gas guzzling trucks, and cars while the other companies restructure to create more economic fuel efficient cars while paying for a work force that doesn't contribute to the company anymore. The market will correct itself, and prices will come down, or there will be fewer companies in the industry.