I have used the Zoho Form for inventory. 

Form Entry:

First question, is there a field of formula to generate a unique field number for each person who fills out the form?

Also, I want people to enter a certain text field, but I do not want this field to be displayed when the DB is searched. 

Form Search:

Quick back story, I am creating a form where people will "enter themselves" on the web (register) as "people/inventory".

Later I want my website's visitors to be able to search the "people/inventory" in the DB and if they see a match, be able to click and buy the "person/inventory" via paypal  for one price (all people same price). 

Once the person/inventory is bought, it needs to come out of the database as a sold item. 

I need to link the unique item# for each "person/inventory"  to the paypal payment link so I know what inventory item was purchased.  

After purchase. the buyer should receive a copy of the "inventory/person" fields that they bought in the database, including the hidden field. 

Does this seem all doable?