Scammers tend to edit their first post after having ripped people of hudreds or thousands of dollars, making it impossible to be of any assistance afterwards.
As a side benefit, it also enforces sellers to adhere to well thought out, logical sale posts rather than a half arsed effort that is of no use to anyone.
If this seems disadvantageous to you, then by all means create a second "placeholder post" for future updates.
Thanks for your suggestion, but this feature is the result of operating under various arrangements for over 6 years. This is the optimal result, deal w/ it.
Kind regards,
Reality.