[Wolves] Value of software package - php/mysql

[Wayne Morris]

Hiya,

I've bodged together a php/mysql database for the company I work for, 
basically just a simple setup with pages to update,
and see info on tenants and properties, reporting pages etc etc.
Its only really novelty is in the field that its written for - and that 
I can edit it to provide a tailored 'solution'.

its probably taken around 50 hours to throw it together, and i've done 
it because it makes my job easier.

Now a similar company has approached my company for a similar set -up, 
which i can easily change mine to do and then they'd probably want
support and changes to make it as they want - they want a couple of 
other things mine doesn't do yet.

So - what's it worth to an end user, and what do people charge for 
'updates' etc.
Do people sell the software or license it? Charge a one off fee for a 
years 'use' and extra for changes?

be interested in some real cash figures obviously and case study where 
product/aftercare stipulated and paid for.

Cheers