[COLOR="DarkRed"]Hello, and welcome to the Forum.
There are a lotta ways to answer this Q.
From a vintage drum forum perspective, the Magnums were Slingerland's last line of drums made during the company's crash and burn in the '80's. These are early-mid '80's drums. Generally, it is considered that Slingy quality vanished around the late '70's...after that the company name got sold a few times over...their hardware became quite poor, their shells (historically always made domestically) became very poor, and then they switched to asian-made shells...which were not highly regarded.
So...the Magnums are from that time, not the more "classic" Slingy era which arguably ended around '78 or so. Anything pre-'80 is therefore considered vintage Slingy...these, in quality, are not in that echelon.
Given that...IMHO...if you have $750 to spend, I think you can get a better, bona-fide vintage kit. It may not quite have all the bells-and-whistles included, though. But for $750 you can get a better kit incl. hardware and cymbals.[/COLOR]
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Now, for the sake of balance...the counter-argument would be:
$750 including everything for a drum set which isn't a low-level contemporary asian kit is a good price (assuming the cymbals aren't junk). So, given that it would be a package deal including cases...again, if the cymbals are just half-decent...it is NOT a bad price for a fully-appointed drum set.[/COLOR]