There hasn't been a huge inflation in hybrids tbh. Rather a deflation in prices. I mean, come on, you can get blue roses for 50k or less now (at least from me).
If anything the prices have deflated a bit since the last time I checked. I used to see them going for 150K per breeding pair. Now I see anywhere from 25K - 100K. I don't really see the problem, as long as there is a high demand people are willing to spend more. The prices probably go up most in summer, because that's when there is most time to spend remodelling towns / playing in general.