I think I am going to pull the trigger on a Dolphin Active 30. Trying to offset the cost as best I can by selling my Polaris TR35P cleaner and Polaris PB4-60 booster pump. Both are just over a year old and have no issues. What do u think is a fair asking price for each. They were $600 and $400 new. I am seeing these vacs sold on FB marketplace anywhere from $75 to $300 depending on age. There are not many pumps tho for me to compare prices. Thoughts?