The EUP-111 in particular seemed like it had a nice sound and touch. I was quoted $6800 for a new one. With my trade-in (a 2007 Hardman & Peck baby grand) it would be a flat $3k.
The particular Essex is a good-looking piano too even though it's just about the cheapest model in Steinway's lowest product line.
I'm curious why you want (need?) to dispose of the Hardman and Peck. I ask that for two reasons.
1) When a dealer offers you close to 60% of the supposed selling price of his new piano in trade-in value for yours, you have to at least ask yourself if you are paying him to trade you down.
2) A Hardman & Peck piano of 2005-2007 vintage in the range of 150 to 180 cm. need not be a bad piano at all. Most of the Chinese pianos of 5 to 10 years ago were delivered in what you might call an unfinished state. I have played Harmans of that era that were terrible and Hardmans that were astonishingly different, usually with the help of a good technician.
Unless it's a space problem, I'd encourage you to have a good technician look at your Hardman and estimate the cost of going through it to clean up what was left undone. You might be surprised. It's entirely possible that with under $1000 it would become a noticeably better piano than the one you're considering trading it for.