Displayed prices are for multiple nights. Check the site for price per night. I see hostels starting at 200b/day and hotels from 500b/day on agoda.
Yes they changed the mattresses but that must be about 4 years ago now. But the new ones not uncomfortable in my experience. They did keep a few of the "old" ones in reserve and offered to change new for old if wanted at the time. (Given the time since the change was made and all that's gone on since then, it's unlikely that they still have any of the old ones left now.)
Hi Toordy. I too am a regular at Dynasty Soi 13 for many years. I asked my mate (Pattaya resident) to pay a visit and check on their status last month as I hadn't had a response to an e-mail. They confirmed that they were definitely open for business again (with some of the previous staff). Although their previous e-mail address [email@example.com] is still valid they said more likely to get a response from firstname.lastname@example.org.