Rarity wise, the first trade is overpay because the red Malk dragon is technically worth just a regular ‘09 rare. Although it does regularly fetch 2-3 ‘09 rares due to it’s demand so it’s up to you which pet you’d prefer to have.
Second trade seems fair, as 2020 stores go for mid 2010 rares. Although be aware that Malk wolves tend to have really good demand while horses do not.
The third trade seems a bit unfair to you. Using rarity math, a 2014 rare and uncommon dont equal a 2013 rare. Plus they’re asking for more on top of that. And again, pps dogs have a lot more tradeability than horses. But if you don’t care about species, then that part doesn’t matter.