Half speed masters. Are they worth the extra scratch?


I just purchased a Dire Straits Brothers in Arms half speed master. I'm using a Pioneer PL530 TT. Can this album be played successfully on my TT? I put it on 45 rpm but there is no way to tell if it is spinning at the right speed. The speed control is working but not keeping a steady reading like when I play a normal 33 record. It sounds good but I'm wondering if they should be played on a different table. Also is it worth it to pay extra money for these? I payed 50$ for this album. Thanks for any information.
knighttodd
+1 @johnto

You generally have to set 45 with a different line of dots on the platter than you do with 33. At least on the older ones I had. That may be the problem you are having if you are trying to get the 33 line on platter to stabilize at 45rpm
The Dire Straights BIA half speed two album set is to be played at 45 rpm. Make sure your the disc isn't slipping and the table is turning 45 rpm. 
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If it is a half-speed mastered 45 then shouldn't it be played back at 22.5?