After spending an embarrassing amount of time searching through this forum, the following is what I've been able to come up with. I hope some of you can provide additions and corrections, as I'm sure I didn't get everything complete and correct. (Which I'm trying to do for the car price comparison tool I provide at truedelta.com.)
Tesla Model S Price and Equipment Changes
Tire upgrade $1,000 ?date
--std with S85, P85
--deleted by 21-inch wheels
1-1-13
http://www.teslamotors.com/blog/2013-model-s-price-increase
Base price $57,400 => $59,900
Performance $92,400 => $94,900
New standard equipment:
Heated seats
4-way lumbar front seats
Memory? (possibly 1/1/13-2/27/13)
--in Tech Pkg otherwise and definitely since 2/27
Dropped standard equipment:
P85 21-inch wheels
New options:
Special red paint $1,500 (production 3-13)
4/50 extended warranty $2,500
2-7-13
Price / package content changes:
Tech Package
--dropped fog lights (as of VIN in the 7000s)
3-22-13 delivery (around VIN 8000; order date?)
Dropped standard equipment:
Leather lower IP, P85?
Alcantara headliner, P85
--later offered people who'd order by x date $500 or a headliner swap
--standard again a few weeks later
4-1-13
http://www.teslamotors.com/about/press/releases/tesla-model-s-sales-exceed-target
Dropped before any delivered:
S40 model
--existing orders fulfilled with software-limited S60s, with performance of S60
--req 60kwh to get supercharger
New option:
Performance Plus Pkg. (production summer 2013)
--req. P85, Tech Pkg, Air susp, 21s
7-1-13
Price / package content changes:
21s $3,500 => $4,500
Air suspension $1,500 => $2,250
8-1-13
Base price changes:
P85 $94,900 => $89,900
New standard equipment:
Xenons (were in Tech Package)
Dropped standard equipment:
Alcantara seat inserts, P85
Alcantara headliner, P85
Air suspension, P85
Leather seats, P85
Ambient lighting, P85? (unclear if previously standard)
Carbon fiber trim, P85
CF spoiler, P85
New options:
Aero 19-inch wheels $2500
Subzero Pkg $750
Fog lights $500 (separate from cornering lights)
--req. Tech Package
Obstacle detection, f and r, $500
--req. Tech Package
Carbon fiber interior on S85 $800
Extended leather, IP top, IP lower, and door armrests $2,500
--req. leather
--leather might already include front door armrests
Alcantara headliner $1,500
--still std on P85?
CF spoiler $1,500 ? (P85 only, and std, on 2/1/14)
Alcantara seat inserts $1,000
--req. leather
Center console trim ("matching yacht floor") $800 ?date
Ambient lighting $1,000
Price / package content changes:
Tech Pkg $3,750 => $3,500
--dropped xenons
--dropped ambient light (if ever had)
Sound Studio Pkg $950 => High Fidelity Sound Pkg $2,500
--no content changes?
Leather no longer includes door panels
Sunroof $1,500 => $2,500
Wood trim $0 (w/leather) => $650 ?date
Third row $1,500 => $2,500
Twin chargers now bundled with high-powered wall charger, $2,700, but can still order separately if call them
10-15-13
Price / package content changes:
Tech Pkg $3,500 => $3,750
--add power folding mirrors
Changes after this point affect 2014s
11-15-13
Base price changes
P85 $89,900 => $93,400
New standard equipment
Alcantara headliner, P85
CF spoiler, P85
Painted calipers, P85
Dropped options
CF spoiler