Over on Amazon, there’s a Milwaukee 4 1/2″ slide-switch angle grinder on sale for $59. They seem to have sold more than they have in stock since there is a message declaring that orders will “usually ship within 3-5 weeks.”
If you need two or three grinders, you’re in luck – there’s currently a “buy two identical Milwaukee grinders, get one free via mail-in rebate” promo going on at the same time.
The lowest price we can find for the angle grinder elsewhere is about $75-$80, not including shipping.
If the above link doesn’t work properly, try this one and be sure to select “Amazon” as the seller from the “more buying choices” box.