Threshold S-150 Should I buy??

The owner is bring it over to my place Sat.afternoon to see what it sounds like in my system. Price will be about $300. US. 75 watts per ch. and I am looking to use it as a Midrange amp for Maggies MG III on an active X/O setup which is not ready yet(speaker rebuilt). I will be able to hear it full range on smaller Maggies. I am on a fixed income so my budget is tight and although my setup won't be ready till late fall. It is a good price on an old Amp and I don't want to let it slide. It is good high current and Maggies need current more so than watts, Being used in the midrange it might even work in the Class A mode alot of the time. I know it would be best to do a recap at some time and that would be just a parts cost. I know some will say why even go active, but I am (Marchand XM-44 X/O) and some will say go tubes, not now maybe later. To Buy or not to Buy? You tell me, will it do a good job on the Mids. Thanks for your input.