By Kirk Miller Good but actually not necessarily great seats to Bruce Springsteen’s concerts are going for up to $5,000, according to Variety. And the reason? It’s called dynamic pricing, and it’s been going on (and enraging fans) for a few years now. You might be familiar with this type of price fluctuation, especially if you’ve ever booked an airline ticket. It’s a way for the ticketing company (here, it’s Ticketmaster) and the artist to retain more money by tying in ticket prices to demand. And those prices, for seats that could be in the front but also in mid-tier or even back-of-house are…