>>Will (or does) the numbering method have an effect on the resale value (thinking about the conversions) of a piece?<<
Marginally at best. A small premium is sometimes sought for early pieces originally issued as GLOWS then 'converted' to Limited Editions. There was also a numbering snafu with the Stamp Series and some of those can seek a small premium.
Some folks think their 'A' editions of the first GLOWs are worth more than retail - but generally GLOWs don't appreciate - you'll be lucky if they hold their retail value.
These sorts of 'numbering varietals' are collected by only a very small handful of Wackos. If you come across 'em at a good price, then go for it.
>>Barnegat is not considered retired? Several
dealers classify the mold I piece as "retired" while selling the Mold II piece as a GLOW.<<
The dealers will say what they will. Both Barnegats are GLOWs, neither can retire. Be cautious with dealers - some are really great some are really so-so. The best practice is to read through HL-dot-Com, and hang in the forums. Don't hesitate to ask questions. Its a fun hobby and there's a wealth of experience, knowledge, and wierd arcana available to the regular forum-goer.
Also - check out Chat Night. But beware - real Wackos attend the chats.
The revised Barnegat GLOW wasn't created from whim - it resulted from a general consensus that the piece was not accurate (too tall & skinny - disproportionate) and several folks expressed an unhappiness with it.