Price Guide Trends

Insulators that have gone up (or down) in relative value the most.

This chart lists the insulators that have gone up or down the most from 2003 to 2007 based on the corresponding price guides. This chart uses the price guide ranges in the price guide. A "delta value" reflects how many ranges the price has changed. Note that the absolute value of the price of the insulator is not considered, just the relative value, in terms of increase or decrease in price range.

For instance, we have the price guide ranges of

$100-125
$125-150
$150-175
$175-200
$200-250

If a piece was worth $125-150 in 2003 and is now worth $175-200, it has moved up two price range levels, or a delta range change of two. Likewise, a piece that was worth $200-250 in 2003 and is now worth $125-150, it has moved down three price range levels, or a delta range change of three.

The table below lists all pieces that have gone down three or more ranges, and those that have gone up four or more ranges.

The two bigger gainers are explained by the fact that CD 271 is the "only one known" in that CD, thus of significant value to CD collectors. The CD 164 H.G.Co. in SB was a pricing error, in that it was priced as though it had drip points, rather than a smooth base.

CD Sort	Primary Embossing	Base	Color	Price 2003	Price 2007	delta
232.2	HEMINGRAY	CB	Clear	400-500	100-125	-8
328	PYREX	SB	Clear	2,000-2,500	800-1,000	-5
328.2	PYREX	SB	Clear	2,000-2,500	800-1,000	-5
328.2	PYREX	SB	Yellow Tint	2,000-2,500	800-1,000	-5
122	MCLAUGHLIN	RDP	Citrine	500-600	250-300	-4
154	MCLAUGHLIN	FDP	Lime Green	40-50	10-15	-4
164	MCLAUGHLIN	FDP	Lime Green	40-50	10-15	-4
164	MCLAUGHLIN	SDP	Lime Green	30-40	5-10	-4
328.2	PYREX	SB	Carnival	3,000-3,500	1,500-1,750	-4
115	MCLAUGHLIN	FDP	Clear	200-250	125-150	-3
115	MCLAUGHLIN	RDP	Clear	200-250	125-150	-3
121	MCLAUGHLIN	SB	Yellow Green	700-800	400-500	-3
145	H.G.CO.	SB	Dark Aqua	200-250	125-150	-3
145	H.G.CO.	SB	Teal Green	800-1,000	500-600	-3
147	PATENT - OTHER	SB	Aqua	250-300	150-175	-3
154	DOMINION	RDP	Peach	15-20	3-5	-3
154	MCLAUGHLIN	RDP	Lime Green	30-40	10-15	-3
154	MIN COM	RDP	Light Aqua	200-250	125-150	-3
162	MCLAUGHLIN	FDP	Lime Green	30-40	10-15	-3
162	MCLAUGHLIN	RDP	Lime Green	30-40	10-15	-3
162	MCLAUGHLIN	SDP	Lime Green	30-40	10-15	-3
164	MCLAUGHLIN	RDP	Lime Green	20-30	5-10	-3
164	MCLAUGHLIN	SDP	Lime Green	30-40	10-15	-3
330	PYREX	SB	Clear	2,000-2,500	1,250-1,500	-3
330	PYREX	SB	Light Yellow	2,000-2,500	1,250-1,500	-3
107	P.S.S.A.	SB	Gingerale	50-75	150-175	4
107	P.S.S.A.	SB	Yellow Olive Green	50-75	150-175	4
120	PATENT - DEC. 19, 1871	SB	Cornflower Blue	1,000-1,250	2,000-2,500	4
121	MCLAUGHLIN	RDP	Light Olive Green	400-500	800-1,000	4
126	BROOKFIELD	SB	Light Aqua	5-10	30-40	4
134	NO EMBOSSING	SB	Aqua	15-20	50-75	4
134	OAKMAN MFG.CO.	BE	Emerald Green	3,500-4,000	7,500-10,000	4
143	DWIGHT	SB	Steel Blue	50-75	150-175	4
154	DIAMOND	RDP	Light Green	3-5	20-30	4
154	MCLAUGHLIN	RDP	Depression Glass Green	100-125	200-250	4
161	CALIFORNIA	SB	Citrine	30-40	100-125	4
162.7	NO EMBOSSING - MEXICO	RDP	Dark Olive Green	100-125	200-250	4
164	MCLAUGHLIN	FDP	Clear	50-75	150-175	4
164	MCLAUGHLIN	RDP	Lemon	30-40	100-125	4
245	NO NAME	SB	Aqua (with glass oil cup)	400-500	800-1,000	4
245	T-H.	SB	Aqua (with glass oil cup)	400-500	800-1,000	4
288	MERSHON	RB	Emerald Green	1,000-1,250	2,000-2,500	4
102	SO.MASS.TEL.CO.	SB	Light Green Aqua	75-100	200-250	5
121	HEMINGRAY	SDP	Yellow Green	75-100	200-250	5
154	LYNCHBURG	SDP	Aqua	5-10	40-50	5
162.4	NO NAME - CANADA	SB	Green	100-125	250-300	5
164	MCLAUGHLIN	FDP	Off Clear	30-40	125-150	5
102	SO.MASS.TEL.CO.	SB	Clear	125-150	350-400	6
120	NO EMBOSSING	SB	Midnight Blue	2,000-2,500	5,000-7,500	6
134	DIAMOND P	SB	Green/Sapphire Blue Two Tone	2,000-2,500	5,000-7,500	6
143	CANADIAN PACIFIC RY.CO.	SB	Dark Sky Blue	50-75	200-250	6
160	HEMINGRAY	RDP	7-up Green	800-1,000	2,500-3,000	6
106	HEMINGRAY	SDP	Light Blue	10-15	100-125	7
143	CANADIAN PACIFIC RY.CO.	SB	Dark Teal Blue	50-75	250-300	7
271	HEMINGRAY	SDP	Hemingray Blue	1,000-1,250	5,000-7,500	10
162	H.G.CO.	SB	Honey Amber	100-125	800-1,000	12