eBay Oil Suction Pump

This pump is what is listed on eBay by many sellers as a pump suitable for a low or rear mounted turbo oil suction pump. A low or rear mounted turbo needs a scavenge pump to return oil to the engine's sump so it won't build up in the turbo. After trying to get more info on these pumps from the sellers ( didn't reply) I did buy one for a project of mine. I am using the pump as an oil primer pump for an engine. This pump is all over the internet and many say the pump is garbage but no one actually has documented anything that I could read or see.
Singflow - This brand of oil pump sells for between $60-140 on eBay.
This video shows my experience with this pump. At this time I have only tested the pump to see if it's suitable for what I plan to do with it. I will update this description as time progresses.