Beercans, appear to be high quality from good sellers (note, I got a near-mint copy with hood for about $125... it's reasonable to go up to $150ish to make sure you get a great copy):
http://www.ebay.com/itm/Minolta-70-...47347886?pt=Camera_Lenses&hash=item51aa2bcbae
http://www.ebay.com/itm/Minolta-Max...84081993?pt=Camera_Lenses&hash=item1c312c7749
http://www.ebay.com/itm/Minolta-SON...03949277?pt=Camera_Lenses&hash=item3380c866dd
http://www.ebay.com/itm/Minolta-AF-...87829883?pt=Camera_Lenses&hash=item3cd002007b
http://www.ebay.com/itm/Minolta-70-...03474703?pt=Camera_Lenses&hash=item485168e70f
http://www.ebay.com/itm/Minolta-Max...40635965?pt=Camera_Lenses&hash=item5d3c1f323d
http://www.ebay.com/itm/Minolta-70-...47347886?pt=Camera_Lenses&hash=item51aa2bcbae
http://www.ebay.com/itm/Minolta-Max...84081993?pt=Camera_Lenses&hash=item1c312c7749
http://www.ebay.com/itm/Minolta-SON...03949277?pt=Camera_Lenses&hash=item3380c866dd
http://www.ebay.com/itm/Minolta-AF-...87829883?pt=Camera_Lenses&hash=item3cd002007b
http://www.ebay.com/itm/Minolta-70-...03474703?pt=Camera_Lenses&hash=item485168e70f
http://www.ebay.com/itm/Minolta-Max...40635965?pt=Camera_Lenses&hash=item5d3c1f323d