Okay, so you are favourable for retail shop with receipt. Sure go for it, but carousell sellers did their end of the research before selling without receipt to be confident of assuring their buyer that what they are paying for is of value.
Do take note of that you state that there might be a chance that Wildwood would be purchasing an export set right?
If you have the chance, take a look at your own switch. (If it's a local set)
Look clearly at the labels - it states for use in Singapore ONLY
Secondly, if it's an export set. It would not even have the contact slip from Maxsoft for warranty claiming purposes.
If you even have a Switch, you'd have known there is no label nor sticker on your switch.
The only thing that will tell you it's a local set is small sticker on the box with distributor name/address and a line "For use in Singapore".
For Maxsoft, they can tell whether it's local set or not from the serial number.
You might think receipt is not important now (which might be true because the thing is just released), but down the road without receipt you can't argue with them the date you bought the item.
Warranty is only 1 year from purchase which is substantiated from the date on your receipt.
Buying this thing without receipt is basically cutting your warranty short.
I'll say this again, carousell seller might knowingly sell you their fault set (either joycon problem, dock problem, screen problem, battery problem, etc.) and you have no option to return/exchange unlike buying from retailer.
Dealing with maxsoft is not the easiest thing to do and you need to ask yourself, is it worth the trouble saving $50 dollars (yes it's only around that much) just to then encounter problem?
Maxsoft is only open Mon-Fri during normal office hours. I don't know about you but as a working adult, it's difficult to find time to go to Maxsoft office twice (to send and to pick up). You likely will have to either take leave or take cab. Neither of those is exactly cheap.