Daily Trading Limit Groups

[BKViper]

Can anyone clarify how many groups of trading items there are, and what falls into each group?
I know:
Group 1: 1 Per Day - Cars
Group 2: 5 Per Day - Paints
Group 3: 5 Per Day - Parts

The paints and parts are in different groups because you can send 5 of each during each trading cycle.
Can someone tell me which groups the following items fall under, or if they are in their own 4th group, or such.
- Museum Cards
- Gift Cards for Specific Cars
- Gift Cards for Levels/Totals/Birthdays
- Anything else that can be traded?

I could try all the permutations over several days to figure it out, but hopefully there is already a readily available answer to this.

 

[DAG0-CHOPPERS61]

gift cards of cars, lvls, birthday, all fall under the 1 car a day trade

 

[Drevenger]

group 1 : 1 per day - cars or gift ticket.
group 2 : 5 per day - paints
group 3 : 5 per day - parts or horns.
group 4 : 5 per day - museum cards

for a total of 16 item sendable per day per ps3.