Listing on eBay using VBA Access 2010 and eBay API XML

General information for the business: Sale of items on eBay
Description of requirements/functionality: Modules must complete the following tasks:

1. Retrieving the Category Hierarchy for a Site.
a. Result – list of categories either saved as a text file with comma or tab separator, or an Access table.
2. Listing of items:
a. Single Item
b. Multi-Variation Listings
3. Modifying Listing’s Data:
a. Change quantity
b. End Listing early
4. Monitor Bidding on items
5. Handling sales
a. Download a list of sold items
b. Send an invoice
c. Change status to ‘dispatched’
Specific technologies required: 1. Preparation of data for the a.m. modules will be done by myself; format to be discussed. Preferrably .csv fiile with comma or tab delimiters, but not limited to. 2. All modules which require a return of data must do it in a form of .csv file
OS requirements: Windows
Extra notes: Working Environment:
Window 8.1
Microsoft Access 2010
Visual Basic for Applications

1. Preparation of data for the a.m. modules will be done by myself ; .csv file with comma or tab delimiters, but not limited to.
2. All modules which require a return of data must do it in a form of .csv file (not XML - you must use a XML converter)
3. Three months after-sale support must be included in price.

PLEASE, send me your proposal in the following form:
a. experience in creating eBay API application
b. time frame
c. FIXED PRICE for the project.