Added the refrigerator, washer & dryer by mistake? I'm sure there's a story in that.
I'm assuming that you were the seller in this transaction (even though your icon says 'home buyer'), and now that you've signed the contract, you have to leave the R/W/D behind, and you want your Realtor to compensate you for their loss.
Let's assume, for the moment (since your agent has already taken responsibility) that it's her fault. She's offering to give you the depreciated value of the items. I presume they weren't brand spankin' new, so she's offering to give you their "market value". And if I'm reading you right, you want her to give you the full replacement value so that you can go out and purchase brand new appliances for the new home.
It's not reasonable to expect her to put you in a better position than you were in, prior to the mistake. She's giving you enough to pay for the appliances that she "handed away" in their current condition. In order to bring yourselves up to brand-new status, you may have to add some money to the pot. Seems like a reasonable solution.
It's not reasonable to expect her to make you "better than whole".