John Gill Commentary Mark 14:5

"For this ointment might have been sold for above three hundred shillings, and given to the poor. And they murmured against her." — Mark 14:5 (ASV)

For it might have been sold for more than three hundred pence

Which, was to the value of our money nine pounds, seven shillings, and sixpence:

and given to the poor ;

which was thought to be a better way of expending it, than by pouring it on the head of Christ:

and they murmured against her :

that she should lavish so much money away in such an imprudent manner; they reproved her for it, expressed much resentment at it, and were very angry with, her upon the account of it; (See Gill on Matthew 26:8), (See Gill on Matthew 26:9).