Yes but that is usually so the customer gets points for the purchase not to supply tickets.They can buy cheap tickets to give as a "prize"and they will be non points earning.
If buying for a FF account there are limits as to the number of points that can be bought.definitely not enough for a "travel agent"to be selling award tickets which is illegal with most loyalty schemes if the purchaser is unrelated.SQ do allow you to buy tickets in anyone's name but a limit of 5 names and they cant be changed for 6 months-wouldn't be viable for a true travel agent.
When you have been on AFF for a while you will realise that what you describe screams scam.
Read this thread and especially posts 3 and 4.
Ripped off by Alpha Flight Guru
Buying miles from someone else is illegal in most/all FF schemes.if the airlines find out ticket voided and you are likely also to have your own FF account reviewed.
I have used many"consolidator"fares over the years and they have earnt points.
So the best case scenario is that your "luxury travel agent"is a fellow who earns lots of points that can be transferred to Krisflyer and has named you as a beneficiary so as to redeem a ticket in your name so giving him a tidy profit selling points.This means no FF points for your flight.
Anything else is probably illegal.