125 for an almost 5 gallon sprayer is not bad at all. For a cheaper model of equivelent size and same type of description, you might be able to save 30-50,
maybe?!
*I have 2 "SOLO" backpack sprayers that have the side pumping action (so you obviously can pump while you are spraying), love them- i think mine were maybe $90?? I think they are a bit smaller too though. I think the Stihl is likely a better product though.