Depending on condition, expect $500-$800.
A 1990 penny black anniversary stamp can be worth five dollars or more. The specific price will vary depending on the rarity of the stamp on the time of sale and condition.
$155.00
That depends on how it is dated. If it is part of a stamp design, it might be much newer and celebrated an anniversary. If it is a cancellation, it might have some value. Consult a good stamp catalog to identify the specific variety.
Perfect condition? In the box? $500-600. Without $400-500.
If you mean the 1949 .03 stamp in mint condition (not used) then it's worth about $1.50 if it is unhinged. If you shop around you can find it in some stores or shows for as low as .50 cents
On E-Bay its selling for about 15.00
You'll have to identify the stamp, as the date 1836 must refer to some anniversary. The earliest US stamp is 1847. Use a catalog online or from your local library to identify the stamp. It will also provide some idea of what the value is.
It is worth the original cost of the stamp.
A stamp is worth more unused
That's very unlikely. The logo was added by a private company and isn't part of the standard design of a US $2 bill. Such items are considered to be altered or damaged and have little or no interest for banknote collectors.
It is worth the cost of the stamp.