LAMS bikes will always be worth more than non-LAMS identical counterparts purely because the learner restrictions create artificial demand hence the bikes cost more, simple supply vs demand.
That's why you'll find 20year old CBR250RR's selling for 5k and 10 years from now still selling for 5k.
The government has introduced new laws which means that provisional riders will need to undergo three years of P-plates (in addition to 3months of Lplates) before being able to ride an unrestricted bike. That means even more people who will have to be riding LAMS bikes and seeing as these people will have to ride their chosen bike for 3 years, people may be more tempted to spend a little extra to get something nice than a 5k jap bike.
When I got my L's my criteria for buying a bike was something new. I had a go at the learner legal kwakkas and cibbies and I could easily justify spending more on a newer bike hence it was open to either the second hand Duc or a new Aprilia RS125... For resale reasons amongst other (such as power!) I choose the duc, figuring the 3year old italian machine ain't going to lose as much as the err... other italian machine.
The new Aprilia RS125 Lorenzo we bought my wife was $9.5k new. I planned to get $5k-$6k for it after 18 months when her licence is upgraded. Is it worth more than that? No. The used market will not pay $8k for that bike. I wouldn't, you might aswell pay $1,500 and buy brand new with warranty.
SG I have seen lots of people on bikesales trying to flog their RS125 for something way too high, especially considering the rebuild needed of the 2stroke motor it needs at about 10,000kms.
The 620 will hold value better than an RS125 for a few reasons mainly they last longer and also because they don't make them anymore, hence back to simple supply v demand, no more supply, prices increase.
At the end of the day though SG makes a valid point in that the bike is only worth what someone is willing to pay for it, however seeing as LAMS 620s are relatively rare, and more people are going to be required to ride a LAMS bike in the near future, I reckon it's worth hanging onto it a bit longer for the 'discerning' buyer to come along... or in other words someone who wants the best LAMS bike available and who has the $$$
