very nice
As for custom work prices, imo there shouldn't be a flat fee, custom work should allow for a flexible price depengin on what your client requires. For the kind of quality you have showing here, if it were custom i would reccomend not charging less than $250 without coding thats a
minimum in my opinion, with standard coding an extra $50
minimum plus extra for each page and plus extra for content#
keep up the good work