Someone put the breaks on me............I've gone over 2 decades without owning any legos, and now.......now, I have been bitten by the collector's bug.  These models are just fantastic and increase way too fast in price.  I need to hop on these NOW before it is too late.
In just the past 2 weeks, I've gobbled up  the following (all are new-in-box):
(Model, Model #, Price Paid)
UCS Snowspeeder 75144 - 220
AT-AT Walker 75054 - 175
UCS Slave 1 75060 - 197
UCS Xwing Red Five 10240 - 279
Death Star Final Dual - 100
Jabba's Sail Barge 75020 - 130
UCS Tie Fighter 75095 - 175
UCS Assault on Hoth 75098 - 250
UCS B-Wing 10227    275
UCS Death Star 75159   480
UCS Death Star II 10143  650 (damaged box)
UCS Vader's Tie Advanced 10175   600
UCS Super Star Destroyer 10221   630
UCS Jedi Starfighter 10215  180
UCS Sandcrawler 75059   280
Ewok Village 10236   300
UCS AT-ST Walker 10174   300
and I am still on the lookout for:
(Model, Model #, Retail Price)
UCS Imperial Shuttle 10212    260
UCS R2D2 10225  300
UCS Tie Interceptor 7181   100
UCS Star Destroyer 10030   300
UCS Y-Wing 10134    120
UCS Tantive IV 10019 and/or    200
UCS Millenium Falcon 10179   500
UCS 2nd TIE Fighter 75095 - 175
To add to the above collection, I hope to one day amass the pieces for the following amazing MOC builds:
Mortesv's UCS Nebulon-B Medical Frigate (expected price > $1500)
https://rebrickable.com/mocs/MOC-5083/cjd_223/mortesvs-ucs-nebulon-b-medical-frigate/#comments  
Moderately Sized Star Destroyer (w Full Interior) (expected price > $1500)
https://rebrickable.com/mocs/MOC-9018/raskolnikov/moderately-sized-star-destroyer-w-full-interior/#comments
Minifig Scale AT-AT w/ Interior (expected price > $1000)
https://rebrickable.com/mocs/MOC-7540/jhaelego/minifig-scale-at-at-w-interior/#comments
I hope to one day replicate the following:
The Rebel Fleet
https://www.eurobricks.com/forum/index.php?/forums/topic/141801-moc-the-empire-strikes-back-rebel-fleet/
GAF ---- what have I done???  And rumor has it that a $700+ Millennium Falcon is due on Sept 1.................RIP my wallet, my free time, my display space, and probably my marriage, LOL