How much could I sell an Empi Select 1.5 Tens Kit for?

So, My mom has an Empi Select 1.5 Tens Kit, and I'm trying to buy an iPhone that was pre owned, and she never uses it, and she said she will sell it so it can go towards the payment of it.

We have:
1 Retangle Electrode, with 4 to a pack
8 Oval Electrodes, with 4 to a pack
1 Empi Select 1.5 Tens Machine
We have all the wires it came with
Instruction Manual
Case

Where could I sell it? We're going to try and get the phone tomorrow if we can, so would a pawn shop buy the Kit from us?

It's worth $700-800 US Dollars. We will ask $200 for it, should we ask higher? It's no a pwn, but a sell.

We own it, so don't worry, it's ours to sell and get rid of if we wish.

Having the original documentation supplied by Empi will go a long way in substantiating both ownership for the TENS device as well as the age of the device. Older units may command a lower price because they may have more hours of usage (similar to mileage on a car). Newer devices with original lease/sale documentation and all original components (to include the box) will sell for a higher price.

A good place to start to determine value is by viewing the completed/sold units on Ebay. The units sold in the late April through early June 2013 timeframe have sold for a low of 30.00 (used), an average price of 75.00 (used) and a high price of 150.00 (brand new).

While you can ask $200.00 for the unit, the buyer is going to be looking for the assurance that the unit is not a fenced item, and for a means of recovering their money if the sale is not legit (as they have no way of knowing who you are).

My personal advice would be to sell it on Ebay where there's the assurance of both buyer and seller protection. I would consider either offering it for a Buy it Now price of $150.00 or starting your opening bid around the average selling price of $75.00 (provided the unit is in like new condition).