No tax for computer accessories
No tax for computer accessories like graphics card and as for PS4 there is duty fee 10% + 10% sales tax if you declare it. Declaring as a gift might complicate your shipment, "Gift" meaning no value but shipping cost say like US$50 what happen is that Customs will confirm whether the item is taxable or not. If it falls under a taxable category, then even if it's a gift, you'll still be taxed.

If your package ship with courier service like DHL or FeDex, they will be your broker agent dealing customs tax for you. If you ship using normal international mail like say USPS, you can appoint pos malaysia as your agent with a fee RM50 (not including your tax/dutyfee), therefore you or anyone who receiving the shipment don't have to drive to where the package is in holding.

Sorry didn't mention earlier that they don't pre calculate tax for your item but they do offer this option to the sender. Reason they expensive most probably due to they deliver within guarantee delivery date, for example if you ship with DHL, their employee is one deliver on your doorsteps not pos laju or others.

If you ship with USPS, pos laju will deliver to your doorstep therefore kinda hard to guarantee you shipment will deliver within estimate day. 

*DHL handling fee is 2% or minimum RM20 not including customs tax (I use their service cause cheaper than Fedex if I ship package from US).