I have a "pencil" quote sitting at home I'll try to post if I can find it. AS a loose guideline, I think the step up to a 4115 from a similarly equipped 4110 was about $2,000. I ended up at just under $16,000 for a 4110, 410 loader with 53" bucket, 60" MMM, and 5-foot box blade. Included in the price was a mulching kit for the MMM, a block heater, and a rear work light. I "feel" like my deal was pretty good. Something under $18,500 for the 4115 might be an okay price, but it might vary with your region. The first quotes I got on an equipped 4110 and 4115 (same as above) were $16,995 and around $19,000, respectively.