Notebook/laptop PCs can last a long time and if you selected the right amount of memory and appropriate size harddrive installed from original purchase then 1st major replacement would probably be battery that most likely will be fairly expensive on an ACER Notebook PC due to low number of ACER Notebook PCs in general, I know bec it happened on my 1st Notebook PC which was Gateway,
It's too late now but truthfully you can't go wrong and I recommend Dell! There are hidden long-run costs that one does not initially see when you purchase a Notebook PC other than Dell, HP or IBM and later encounter difficulties or attempt buying replacement parts like a battery, or say a keyboard etc.
We own 3 Dell Notebook PCs and why I recommend DELL, HP or IBM for those living in the United States is that those 3 particular PC Notebook manufacturers literally supply all the business Notebook PCs to the major corporations and Government so replacement parts are readily available esp on EBAY at even a more reasonable price than the manufacturer website. Thus in the long run, being able to get the exact replacement part extends the life on your investment.
FYI my 1st Notebook PC was Gateway bec I couldn't afford Dell at the time and what a mistake is was when I needed to purchase a new Notebook battery <= costly bec not readily available like Dells... and FYI I also ran into a similar problem when attempting to upgrade the memory.
Note if you are looking for DELL bargains, then visit their DELL OUTLET site...
Hope the Above Info Helps!