No doubt they are priceless.
In any case Money is nothing but time and donation of money to god indicates sharing of good fortune in a gesture of thanks.
However the trustees of the temple have a far greater responsibility to spend that money for public welfare and for the establishment of Dharma.
Rather than storing all that gold and putting money in FD and giving it to the govt., they should be starting sanskrit schools and spending to educate hindus about Hinduism.
Its sad that these trustees are under govt. control.
...... anyway topic for another thread.
To the point however, The Smriti for the Kali Yuga in this kalpa is not the Manusmriti but the Parashara Smriti and it says,
"Tapa param krityuge, Tetraya gayna muchyete,
Dvaypare yagnevahum, Danameva Kali yuge".
It means, That the rules for Dhama for the each age are,
"Tapasya for the Krit Yuga, Gaining knowledge in the Treta yuga,
Yagna (homa - vedic) for the Vaypara yuga and Charity in the Kali Yuga".