Im a bit of a resident of the "basement" hehehe ...
For me I is a case to case basis as well. Some figures that I got are quite good. Most of the 3rd party figures I got so far have been of good quality, the abs plastic materials tend to be sturdier and non cheap in look and feel. Having said that not all 3rd parties can be of good quality. There are hits and there definitely misses. I buy from figures to add on accessories, to even , shhhhh, ehrmemm eherrm KO stuff....
yeah I know it's why Im a basement resident along with HD hahahah...
Here's but a few of the 3rd party stuff I got...

Most of these I am pleased, some Im just ...meh it'll do- like the add on kit for Superion Maximus - at the time it was released it was, "okay gotta get that" but once Ive gotten it... it has flaws which in a way is because of the base figures fault and not really because of the set... another is the add on accessories for a more G1esque generations Roadbuster - the quality of the material is horrible and brittle... so yeah it's all a bit of hits and misses...
One figure in particular which is a real waste of a good idea - the concept is good and would've been awesome but the execution is very much lacking IMO
---- Sonicron - which I did a review as well
http://www.otca.com.au/boards/showth...onicron+review
Im glad this was a cheap purchase - which I would say should've been cheaper with the poor quality of the figure or better yet they should've polished the execution first before deciding to release it, coz honestly it's a shame - it would've been awesome had the execution of the figure been more of better quality. Even his Cassettes are a hit and miss, while the not-Ratbat is good, the not-Ravage is meh - but then I lok at MP Ravage and a deep sigh comes to me...this is an MP figure? really?

Do I think these are priced well... no.... I still buy em though. A lot of em enhance an existing figure e.g. the FP trailer add ons for city Commander and the Not-Rodimus, a couple are great and better incarnations of characters that for some reason HasTakTom seem to pay no attention to... until it get's a third party treatment hehehe but there are times that the 3rd party kinda wins over the official one ...but generally I think the prices could be a tad lower... of course since it's all of limited number in production that's unlikely to happen...but yeah, generally the pricing for the 3rd party stuff are high and at times bordering on, "are you kidding me" high...just look at the Crazy Devy add ons
Will I keep buying them , yup I will selectively, as some figures HasTakTom just wont release for some reason beyond me - e.g. Generations Arcee, or if the character it was based on is one I really like but the official one just wont cut it or is just as pricey...e.g. Botcon Chromedome figure vs Function x-1.... of course if it was priced really high... then I can live without em.
Now for the ehreem KOs.... well some people don't approve... me Im flexible... e.g. Dino cassettes - will I be able to afford the original... don't think so, even if I can would I buy them - the price they go these days since they are rare is quite prohibitive... I could prolly buy a heaps more of other stuff, heck It is very well my plane ticket cost already so NO. So I settled for the KO...and am still hoping for a proper Encore version......till then the Kos stay


and of course there are the 3rd party stuff that HaTakTom would definitely not manufacture in such a scale at all ocz well, it's not their product at all so if we ever get these , thanks HasTakTom, if not, well there always the 3rd party for it - e.g.
Energon Cubes
Wanted AM partner Vanguard, Myclones Dirge, G1 Victory Leo, e-hobby Dark scream ( the black version), e-hobby Magnificus
Parts- AM partner Basher-side guns, G1 Actionmaster Elite Windmill's blades[I][B]