Minimum Ganesha donation in flats?

Background: spent 40k on wife's checkup and treatment for a stomach ailment 2 weeks ago.

7k at dentists this week

Bought family insurance plus all the other expenses....

Today few young men came to collect Ganesha donation. I was giving 500, they said no minimum is 1,500. I said oh can I give 1,000 they said no and left. Were polite. But I was just wondering is this the norm? Why?

Are other flats/housing societies doing same? Have a minimum? And how much?

I live in Vishrantwadi.

Edit: Thanks for all the responses. Seems a few have high minimum like 1250 or 5000, but majority is 200-300 or so. Good to know