Fleet revamp, failing to cut the fleet

I bought a few cars over the last ten years or so, but never have I had so many ins and out in such a short period of time...

Tues 3rd Nov, Prairie goes
Thurs 5th Nov, Saab 9-5 goes
Sun 8th Nov, Hyundai Scoupe comes in
Mon 9th Nov, Rover 45 V6 goes
Tues 10th Nov, Saab 900 goes
Tues 10th Nov, Saab 9000 in
Wed 11th Nov, Rover Tomcat in
Fri 13th Nov, Volvo V70 in
Sun 15th Nov, Mk1 Punto bought (still awaiting collection in Birmingham)

So on the 2nd, I had:
'84 Stanza
'89 Prairie
'97 Saab 9-5
'92 Saab 900
'00 Rover 45 V6
'90 Rover 820

But by the 15th, I had:
'84 Stanza
'90 Rover 820
'89 Saab 9000
'98 Rover Tomcat
'94 Hyundai Scoupe
'00 Volvo V70
'98 Punto

Four out, five in. I'm just not very good at trimming down the fleet.