New tank , compressor or pump ?

I fear I will end up with one of these someday. $350.00. Current hydrostatic test.
Click: https://www.ebay.com/itm/FREE-SHIPPING-WITH-4-OR-MORE-4500-AIR-CASCADE-CYLINDER-SCUBA-TANK-STORAGE/202253109006?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m1438.l2649



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