Preface: I’m a complete noob but...
If buying a bike is anything like buying a car then you definitely don’t want a new one. I’ve been told this is true for bikes too. But I see all these used 2018+ ninja 400’s for sale going for $4,300-$5,000 all the time. I think to myself, “Well, I might has well a get a brand new one just the way I want it and just pay the few hundred dollars more”.
Any input guys? Should I just get a new one and can I expect to sell it with a few thousand miles next year for around 4.5k like I’ve been seeing?
As said here, the dealer fees will likely put the price near $6,000. When I can afford it , my preference is to buy new. That way the mods, scratches and miles are all mine. I've purchased. about 20 motorcycles in the last 40 years. About 50% new the rest used.
Sometimes used bikes can have hidden surprises both good and bad. A knowledgeable motorcycle purchaser will look at many , for sale, bikes before purchasing. The savvy used bike buyer, initially, appears to save money until hours of research and haggling time are accounted for. I enjoy the research and haggling and I have the time , so it's a hobby.
If you have the time and love the research (as I do) then go for it.
Often the cost of deferred service (expendables like tires, brake fluid flush, oil change, chain and sprockets etc.) needed on a used bike will make the price equal to new. Dealers often advertise used bikes as freshly serviced. Bikes advertised as " service up to date" by a dealer are seldom true...usually what I find is that they have had an oil change and been given the bike a wash.
New bikes are like a blank palette. Buying new you get to decide color, accessories , ABS or non ABS , the model year and delivery time frame and of course standard warranty or extended warranty. Break in is also done at your preference.
So yes it is worth it to buy new if you are not knowledgeable about motorcycle maintenance and possible other issues.
Likewise, if you have the time and patience to learn and research then used will save you money, but the days and hours spent researching will go unaccounted for.