Great example of how hard it is to make appraisals, especially when it comes to end-user prices. You seems to be an end-user and this domain made sense to you and you actually developed the domain so if this domain is important for your business you probably made a good deal. Since you developed and advertised the domain it is even worth more to you. However such factors often doesn't have any effect on the resale price of the domain unless you want to sell domain and content etc.
This domain for sure has some resale value but in the $xx range.
as you have a brandalbe here, it is not a good idea for the appraisal section. Since you are developing it, it will obviously be valauble. For the domain name alone, the most x-xx.